Flash Steps:
- first unpack the rom.zip using payload dumper, copy boot.img, dtbo.img, vendor_kernel_boot.img, vendor_boot.img
- reboot to bootloader
- flash boot.img, dtbo.img, vendor_kernel_boot.img
- reboot bootloader
- flash vendor_boot.img
- reboot to recovery
- flash rom.zip using adb sideload
- format data
- reboot to system
- enjoy